Remove unused add_csv_filter_to_gtkchooser() function completely
Remove unused add_csv_filter_to_gtkchooser() function completely

gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm